Polishing apparatus, specially for knives, forks, and spoons



April 18, 1933. R ERN 1,904,282

SPQONS SHING APPARATUS, SPECIALLY FOR KNIVES, FORKS, AND

POLI

2 Sheets-Sheet 1 Filed May 29, 1930 April 18, 1933. R, ERN 1,904,282

ONS

ING APPARATUS, SPECIALLY FOR KNIVES, FORKS, AND SPO POLISH 2 Sheets-Sheet 2 Filed May 29, 1950 Mix Patented Apr. 18, 1933 "Rosaariant," or soILI' GEN," GERMANY,

" 'rotrsnimarin mu srnoIALLY raaxmvssfmqaks, AnnsrodNs.

hpplication fi ledv 1930, Serial No. 457,457, a1i'din Germany dune 3, 1 529. i

' This invention relates 'toa polishingapparat-us specially for-knives, forks and spoons, composed of a rotating ['polishmg wheel and a'discarrangedf the side-of the polishing wheel; rotating f'comparativ ely slowly, similar to a turretheadand carrying the articles "and bringing the same against the polishing Wheel. Y

According to the invention oscillatablelevers are mountedon the feeding disc so that tliey project beyond the disc rim, said levers carrying on their extreme ends the knives, forks and spoons and being held by suitable means, for instance springs and eventually by stops in a certain position with regard to the polishing wheel so that, during the polishing,

they are pressed together with the knives, forksand spoons at varying adjusting angles against the polishing Wheel.

In comparison with the polishing apparatus of known type in which the adjusting angle between the grinding tools and the carrier of the knives, forks and spoons is always the same, so that a uniform polishing of all the articles is not possible, the important advantage is attained by the invention that the articles to be'polished are worked upon by the polishing disc at changingangles of presentation similar as in the case'of manual 0 treatment. I A completely mechanical polishsame quality as when the work is donev by 1 hand. The apparatus presents further the along the polishing wheel may be treated not only in one direction, but in different directions, the leversemployed, which project over the rim of the carrying or feeding disc and oscillatable in their plane, are also controlled by yieldable elements.

Several embodiments .are illustrated by way of example in the accompanying drawings in which j,

Fig. 1 shows the polishing apparatus in side elevation.

Fig. 2 shows also in side elevation a second form of construction of the polishing apparatus.

' ing Work is therefore obtained and of the.

-, is atop plan view of Fig. 2. 2 (Figs. 4 and'5 illustrate in t 'o-diiferent positions the levers carrying the articles".

Referring to Fig. 1 a disc 3 is rotatably mounted on a shaft 2 j ournalled in a frame 65 1, said disc carrying studs 4 on' its circumference, on which'two-armed levers 5 are oscilla'tably mounted. -Suitable means; %7 for holding thearticle's to be polished, for instance spoons '8, a-re'arranged on the' oute'r ends 6' of the double armed levers. Spiral springs 10 are attached on the inner ends of the doublearm'ed levers 5;;md' fixed at their other end to pins 11. :Thesesprings can pull the double arnie'd'levers' 5 against'stops 12. At the side ofthe-frame 1 'carrying the disc 3 aframe -13-with a polishing wheel 14 is arranged, this wheel being constructed as a polishing cloth wheel. r j

flhe disc 3 for oarryingthe articles to zbe polished as also the polishing wheel 14 are rotate'd in the same-direction indicated' by arrows, th e polishing wheel 14, rotating preferably at high speed inorder to obtain a.

good polishing 'eifect. I The wheel 3 base comparatively largediameter and rotates,

compared with polishing wheel'14, at a slow speed in, order that the articles to be polished may be carried through the polishing wheel forthe period necessary to obtain a'good poli'shing effectfiThe' slow revolving speed of wheel Sis; practical in orderthat the person attending th'e' apparatus can place during the rotation of wheel 3 the articles to be polished onto the double-armed'levers 5' and -re'm'0've "the'polished articles "from these'lever's,

'It' is clear that thedouble armedllevers 5 are oscillated aroundtheir' pivot bolts 4 and move away from 'the abutment-pins .12 as soon as they or the articles to be polished 9O arrive on the path of the polishing wheel. Accordingto the-kind "of resistance offered by the polishing wheel'the springs 10 have the tendency to"'return the double armed {lever-s 5 into theirlin'itial position. In this manner the articles to be polished are notonly subjected to a circulating'move'ment produced by' thewheel 3 but submitted also'toan oscilf lating movement around the bolts 4. 'lhe double movement obtained 1 in this manner polishing wheel 1a is not acting upon the arti-.

cles these levers 16 are'parallel to the axle 2.

The polishing wheel carries out, as can be seen from Fig. 4, first a polishing in transverse direction. The lever 16 is, as shown in Fig.5, gradually oscillated at the continuing rotation of disc 3. It assumes byand by the posltionof the lever 6 and returns from this position gradually into the initial position shown in Fig. 4.

It is evident that the transverse polishing isrgradually transformed into longitudinal polishing, the adjustable angle ofpresentation of the articles to be polished being at the same time displaced in the plane of the wheel through the action of the springs 10.

Experiments have shown that by this apparatus the polishing of articles can be finished without preliminarytreatment, this being specially important for such articles such as knives, forks, spoons or the like, comprising in combination a rotating flexible polishing wheel, a turret like article carrying member supported adjacent said wheel for rotation at-a slower speed than said wheel to present said articles successively to said wheel, a plurality of elementspivoted to said member for oscillation about axes substantially parallel to the axis of rotation of said member, an article carrying element pivoted to each of said oscillatable elements for movement under the influence of contact with said wheel in planes perpendicular to the plane of rotation of said member, and yielding means acting between said member and said first named elements for urging the latter about their pivotal points into contact with the said wheel, said memberand wheel being so closely disposedwith relation to each other that contact of the articles with said wheel will cause said first mentioned elements to yield and present said articles to said disc at varying angles in a plane substantially perpendicular to the axis of rotation of said member. p v

In testimony whereof I affix-my si nature.

. ROBERT RN.

which are difiicult to polish owing to their i shape or material.

I claim I 1 i ;1. An apparatus for polishing articles, such as knives,,forks, spoons or the like, comprising in combination a rotating flexible laminated polishing wheel, a turret like article carrying disc disposed adjacent said wheel and adapted to rotate at a slower speed than said wheel and to present said articles to said wheel, oscillatable levers pivoted to said disc and adapted to project beyond the rim thereof, article carrying members pivoted to said levers for movement in planes perpendicular to the plane of said disc, spring means connecting said disc with said levers and adapted to urge said levers toward their initial extended positions, stops on said disc for holding said'levers in said extended positions, resilient means for urging said article carrying members toward positions transverse to the plane of said disc, said disc and said wheel being so closely disposed with rela tion to each other that said articles are adapted to be embedded to some extent within the surface of said wheel, whereby the frictional contact will cause said levers and said members to yield so as to present said articles to said wheel at varying angles both within the plane of said disc and perpendicularly thereto, thus effecting the gradual transformation of transverse polishing to longitudinal polishing. r

2. -An "apparatus for polishing articles, 

